NOTE: As their name suggests hints are not exactly Rayman 3 HD cheats, and are usually just simple (but very useful) tips on how you can unlock secret level, features, find hidden areas and such. Hopefully these will make playing Rayman 3 HD even more entertaining.

Coin-op gamer (Bronze): Unlock and play all the arcade games.
Disco Trip Master (Silver): Complete any disco trip without retrying.
Flower power (Silver): Find and get the bonus score of every Tribelle.
Green's so in (Silver): Get all the Green Jewels.
Hands on the prize (Bronze): Retrieve Rayman's hands from Globox.
Hero of the Teensies (Bronze): Save every teensie in the game.
Junior Journalist (Bronze): Take your first picture in the game.
Patience pays off (Bronze): Watch the real ending.
Perfection needs no arms (Gold): Complete every chapter with a perfect score.
Pest control (Silver): Find and get the bonus score of every Matuvu.
Taste All the Superpowers (Bronze): Collect every superpower.
Where is my Andy? (Bronze): Complete all the chapters.